# U211B on the 2025 Ford F\-150

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name U211B

- [11037569](https://open.wenmarpro.com/bulletins/11037569), 2026-09-30: Some 2024\-2026 F\-150, 2025 Explorer/Aviator, 2025\-2026 Expedition/Navigator, or 2026 F\-Super Duty vehicles may exhibit diagnostic trouble code \(DTC\) U211B:43:48 stored in the body control module \(BCM\) when performing a Self\-Test. This DTC sets due to an internal BCM timing issue during the self\-test process. This specific code has no customer impact and does not cause any drivability concerns or warning messages. Clearing DTC U211B:43:48, reprogramming the BCM, or replacing the BCM is unlikely to prevent this DTC from setting. This DTC does not trigger a condition covered under warranty. Note: This guidance only applies to U211B with the specific failure byte 43 in status 48. Any other trusted real\-time operation network \(TRON\) DTCs or different failure bytes associated with U211B are still applicable and technicians must follow Workshop Manual \(WSM\) normal diagnostics for those DTCs.
- [11018238](https://open.wenmarpro.com/bulletins/11018238), 2025-05-13: After replacement of any TRON module, the gateway module \(GWM\) and the TRON capable modules can set diagnostic trouble codes \(DTCs\) U211A, U211B, U211C, U3034, U3035, U3036, U35D9, U35DA and/or U35DB if the secret authentication security keys are not aligned between the modules, a loss of communication is occurring between modules and/or a module is not responding. This may be a result of missing the new module secret authentication security key obtained when running the Ford Diagnosis and Repair System \(FDRS\) "Trusted Real\-Time Operation Network \(TRON\) Module Authentication" procedure after replacement. When replacing a TRON capable module, run the FDRS "Trusted Real\-Time Operation Network \(TRON\) Module Authentication" procedure in the GWM tool box, not in the toolbox of the module with the DTC's, to distribute a new set of secret authentication security keys to all TRON\-capable modules. Using the specific vehicle identification number \(VIN\), refer to Workshop Manual \(WSM\), Section 418\-00 and 418\-01 for updated DTCs, applicable TRON module listings and pinpoint tests.
- [11017064](https://open.wenmarpro.com/bulletins/11017064), 2025-04-16: After replacement of any TRON module, the gateway module \(GWM\) and the TRON capable modules can set diagnostic trouble codes \(DTCs\) U211A, U211B, U211C, U3034, U3035, U3036, U35D9, U35DA and/or U35DB if the secret authentication security keys are not aligned between the modules, a loss of communication is occuring between modules and/or a module is not responding. This may be a result of missing the new module secret authentication security key obtained when running the Ford Diagnosis and Repair System \(FDRS\) "Trusted Real\-Time Operation Network \(TRON\) Module Authentication" procedure after replacement. When replacing a TRON capable module, run the FDRS "Trusted Real\-Time Operation Network \(TRON\) Module Authentication" procedure to distribute a new set of secret authentication security keys to all TRON\-capable modules. Using the specific VIN, refer to Workshop Manual \(WSM\), Section 418\-00 and 418\-01 for updated DTCs, applicable TRON module listings and pinpoint tests.